Malicious PDF — malware analysis report

Static analysis result for SHA-256 280d6020a8363da6…

MALICIOUS

PDF

83.1 KB Created: 2021-09-04 20:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2de0bc50c9aba509f4988fbe297a8f01 SHA-1: 9d0a9fc44af7e198e9673423020ee35f0ac6bae2 SHA-256: 280d6020a8363da6a4cb7ae68b633aa4232c6615a6ed67460c61804c5a0fb628
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload directories or disposable domains, suggesting an attempt to distribute phishing content or malware. No scripts were extracted, but the presence of numerous external URIs indicates a strong likelihood of redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://oniceh.ru/uplcv?utm_term=their+finest+hour+pdf PDF link annotation
    • http://asbu.net/uploads/FCK_files/file/2714787930.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/71111570273.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160952544bcb86---65107264922.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/9bc7b91cf282d5403a0cb46ac70714f5/85295471128.pdfIn PDF document text
    • http://ipceurope.com/assets/file/30021145604.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/9880d6a4efff5457f3f0410161058a50/76390368670.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/59955071779.pdfIn PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/riribizuzifoxe.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/xezilujudosusixizuf.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/83874651715.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4782a11feb---xuzokuragosa.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/76490075323.pdfIn PDF document text
    • https://ready4use.ru/uploads/files/41182592959.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/b984098fa3ccc93415f9d4b3b751027d/wiwaxifoxobo.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/jijajojape.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/15553634495.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/71750225286.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/42521292164.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/8ffephclf5huh05emin9s8tgt3/dafabazozonojaxelegafakos.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebc4753eaf---31360423221.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609dae107ba82---96246951665.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/ba6bd41f6776f58dc4babcb861334c06/95554950838.pdfIn PDF document text
    • http://boldogelet.hu/media/rajuvaki.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bfab41fff---pemeruwulag.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/74533863377.pdfIn PDF document text
    • http://yongqingtech.com/d/files/84548583425.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/datiba.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02A 10448 bytes
SHA-256: 77bcdf3a354420cc9e3181b6bdcf619781438364c3679173ac7abfca11136db4
font_01_sfnt_off0000f7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE4 17876 bytes
SHA-256: f272d616b0118337f40cab198b8a604224770008226263e06b894ce0f1d8eb5b

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